SPACI score report for 1a6m in ASTRAL 2.08:

PDB Entry: 1a6m
SPACI score: 1.04
AEROSPACI score: 1.04

Experiment type: XRAY
Resolution: 1
R-factor: 0.127
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 1
WCK1 WHAT_CHECK Packing: 0.214
WCK2 WHAT_CHECK Ramachandran: 1.532
WCK3 WHAT_CHECK Chi angles: 0.543
WCK4 WHAT_CHECK Backbone: 1.554

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).